Free SSL CertificateChecker
Check your SSL certificate instantly. See expiration, TLS version, cipher suites, key strength, and get a scored security report.
Enter your domain
Type any domain — we handle the connection.
We inspect the certificate
We connect over HTTPS and analyze the TLS handshake and certificate chain.
Get your scored report
See your score out of 100 with details on expiration, TLS, cipher, and more.
What is an SSL certificate?
An SSL/TLS certificate encrypts the connection between your visitors' browsers and your server. It ensures data like passwords, credit cards, and personal information can't be intercepted. The padlock icon in the browser address bar indicates a valid SSL certificate is in use.
Why check your SSL certificate?
Expired or misconfigured certificates cause browser warnings that scare away visitors. Weak TLS versions or cipher suites leave connections vulnerable. Self-signed certificates aren't trusted by browsers. Regular checks ensure your encryption stays strong and your certificate renews before it expires.
What does this tool check?
We connect to your server over HTTPS and inspect the SSL/TLS handshake. We check certificate expiration (days remaining), TLS protocol version (1.2 vs 1.3), certificate authority (trusted CA vs self-signed), key strength (RSA/ECDSA bit size), and Subject Alternative Names. You get a score out of 100 and specific recommendations.